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The exploration of extremely large antenna arrays (ELAAs) using high-frequency spectrum has led to a paradigm shift in electromagnetic radiation field, transitioning from the common use case of far-field propagation to near-field…

Information Theory · Computer Science 2024-04-30 Zhenyao He , Wei Xu , Zhaohui Yang , Hong Shen , Ningning Fu , Yongming Huang , Zhaoyang Zhang , Xiaohu You

Extremely large-scale antenna arrays, tremendously high frequencies, and new types of antennas are three clear trends in multi-antenna technology for supporting the sixth-generation (6G) networks. To properly account for the new…

Information Theory · Computer Science 2024-09-09 Yuanwei Liu , Zhaolin Wang , Jiaqi Xu , Chongjun Ouyang , Xidong Mu , Robert Schober

Extremely large-scale antenna array (ELAA) systems emerge as a promising technology in beyond 5G and 6G wireless networks to support the deployment of distributed architectures. This paper explores the use of ELAAs to enable joint…

Extremely large-scale antenna arrays (ELAAs) have emerged as a pivotal technology for addressing the unprecedented performance demands of next-generation wireless communication systems. To enhance their practicality, we propose…

Signal Processing · Electrical Eng. & Systems 2026-01-21 Zhengyu Wang , Tiebin Mi , Gui Zhou , Robert C. Qiu

Integrated sensing and communications (ISAC) is a promising component of 6G networks, fusing communication and radar technologies to facilitate new services. Additionally, the use of extremely large-scale antenna arrays (ELAA) at the ISAC…

Signal Processing · Electrical Eng. & Systems 2024-12-30 Sajad Daei , Amirreza Zamani , Saikat Chatterjee , Mikael Skoglund , Gabor Fodor

In the sixth-generation (6G), the extremely large-scale multiple-input-multiple-output (XL-MIMO) is considered a promising enabling technology. With the further expansion of array element number and frequency bands, near-field effects will…

Information Theory · Computer Science 2024-04-29 Haiyang Miao , Jianhua Zhang , Pan Tang , Lei Tian , Weirang Zuo , Qi Wei , Guangyi Liu

Electromagnetic information theory (EIT) is one of the emerging topics for 6G communication due to its potential to reveal the performance limit of wireless communication systems. For EIT, the research foundation is reasonable and accurate…

Information Theory · Computer Science 2024-05-28 Zhongzhichao Wan , Jieao Zhu , Linglong Dai

The sixth generation (6G) communication networks are featured by integrated sensing and communications (ISAC), revolutionizing base stations (BSs) and terminals. Additionally, in the unfolding 6G landscape, a pivotal physical layer…

Signal Processing · Electrical Eng. & Systems 2024-10-01 Kaiqian Qu , Shuaishuai Guo , Jia Ye , Nasir Saeed

Channel measurements are the prerequisite for applying emerging transmission technologies and designing communication systems. In sixth-generation (6G) system, conventional time or frequency domain channel sounding methods cannot directly…

Signal Processing · Electrical Eng. & Systems 2025-10-23 Kaifeng Bao , Tao Zhou , Chaoyi Li , Liu Liu , Bo Ai

Joint communication and sensing (JCS) is envisioned as an enabler of future 6G networks. One of the key features of these networks will be the use of extremely large aperture arrays (ELAAs) and high operating frequencies, which will result…

Signal Processing · Electrical Eng. & Systems 2024-05-09 Caterina Giovannetti , Nicolò Decarli , Davide Dardari

Extremely large antenna arrays (ELAAs) are widely adopted in mmWave/THz communications to compensate for the severe path loss, wherein the channel estimation remains a significant challenge since the Rayleigh distance of ELAAs stretches to…

Signal Processing · Electrical Eng. & Systems 2026-03-17 Yiming Chen , Hongwei Wang , Lingxiang Li , Zhi Chen

Terahertz (THz) extremely large-scale MIMO (XL-MIMO) is considered a key enabling technology for 6G and beyond due to its advantages such as wide bandwidth and high beam gain. As the frequency and array size increase, users are more likely…

Signal Processing · Electrical Eng. & Systems 2025-05-15 Huixin Xu , Jianhua Zhang , Pan Tang , Hongbo Xing , Chong Han , Lei Tian , Qixing Wang , Guangyi Liu

Extremely large antenna array (ELAA) not only effectively enhances system communication performance but also improves the sensing capabilities of communication systems, making it one of the key enabling technologies in 6G wireless networks.…

Signal Processing · Electrical Eng. & Systems 2025-06-03 Boyu Teng , Xiaojun Yuan , Rui Wang , Ying-Chang Liang

This paper proposes a novel pilot scheme for multi-user uplink channel estimation in extra-large-scale massive MIMO (XL-MIMO) systems with extremely large aperture arrays (ELAA). The large aperture of ELAA introduces spatial…

Signal Processing · Electrical Eng. & Systems 2025-12-12 Yumeng Zhang , Huayan Guo , Vincent Lau

Extremely large aperture arrays (ELAAs) can offer massive spatial multiplexing gains in the radiative near-field region in beyond 5G systems. While near-field channel modeling for uniform linear arrays has been extensively explored in the…

Signal Processing · Electrical Eng. & Systems 2024-10-01 Özlem Tuğfe Demir , Alva Kosasih , Emil Björnson

In this article, we present our vision for how extremely large aperture arrays (ELAAs), equipped with hundreds or thousands of antennas, can play a major role in future 6G networks by enabling a remarkable increase in data rates through…

Signal Processing · Electrical Eng. & Systems 2023-10-23 Parisa Ramezani , Alva Kosasih , Amna Irshad , Emil Björnson

Near-field beamfocusing enabled by extremely large-aperture arrays (ELAA) is a promising 6G technique for massive connectivity and high spectrum efficiency. While beamfocusing concentrates energy at an intended user, the radiated field…

Information Theory · Computer Science 2026-05-26 Shima Mashhadi , Tiep M. Hoang , Alireza Vahid

6G radio access architecture is envisioned to contain a network of short-range in-X subnetworks with enhanced capabilities to provide efficient and reliable wireless connectivity. Short-range communications in industrial environments are…

Signal Processing · Electrical Eng. & Systems 2025-03-14 Juha-Matti Runtti , Usman Virk , Pekka Kyosti , Lassi Hentil , Jukka Kyrolainen , Fengchun Zhang

Conventional localization techniques typically assume far-field (FF) propagation characterized by planar wavefronts and simplified spatial relationships. The use of higher carrier frequencies has given rise to the paradigm of extra large…

Signal Processing · Electrical Eng. & Systems 2026-03-30 Wasif J. Hussain , Don-Roberts Emenonye , R. Michael Buehrer , Harpreet S. Dhillon

The upper mid-band (or FR3, spanning 6-24 GHz) is a crucial frequency range for next-generation mobile networks, offering a favorable balance between coverage and spectrum efficiency. From another perspective, the systems operating in the…

Signal Processing · Electrical Eng. & Systems 2024-12-05 Ali Rasteh , Raghavendra Palayam Hari , Hao Guo , Marco Mezzavilla , Sundeep Rangan